Ore-separator.



No. 69|,8l9.- Patented Jan. 28, m2.

J. .1. SNIDER. I ORE SEPARATOB.

(Application filed Mar. 5, 1901.)

(No Modal.)

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1 4 1 3 24- as r A I s a i f 1 04c)" Q/II rem-or HE. E 1 5' f l \l WW 4 i W I/IIII IIII WITNESSES UNITED STATES PATENT OFFICE.

JAY J. SNIDER,OF XENIA, OHIO.

ORE-S EPARATO R'.

SBEQIFIQATION forming part of Letters Patent No. 691,819, dated January 28, 1902.

vide a very simple construction'of apparatus 1 positive in its action. a In the accompanying drawings, Figure 1 shows the separator in sectional view. Fig. 2

'is a plan view of the same. Fig. 3 is a detail perspective View of the discharging end of the bed, showing the particular construction. atthispoint.

Heretofore it has'been proposed to utilize a bed of flexible fabric, through which pulsa': tions of air areforced to act upon the ore as it is fed upon the bed,and to locate above thisbed a grating composed ofa-seriesof strips'running diagonally across the upper sideof, the

bed, with other strips running diagonally in a contrary arrangement. The spaces between the lower stripsforth-.channels, into which the heavy particles gravitate, being guided to one discharge-corner,while the lighter and earthyparticles rise between the upper strips and are guided by them in-a direction contrary to that of the ore particles and are discharged into a'channel extending along the side of the length of the concentrating-bed proper. Generally this action is carried out in my device; but I have materiallyimproved this action by utilizing instead of a bellows, as heretofore used, a chamber beneath the bed, which is in communication with a source of; pressure, such as compressed air, this pressure being admitted to thechamber atiutervals and with any degree of force, thus acting upon the material-to be concentrated as it is fed upon the bed. By the use of a positive pressure, which can be instantly applied and as readily cut off, a more perfect action is secured, as the moment the pressure ceases the chamber beneath the bed contains only air under atmospheric pressure-and the ore instantly falls according to its specific gravity. I preferably admit the air under greater pressure to the chamber'ibeneath the bed in Serial No. 49,762. (No model.) a

such a manner asto assure itsuniform action throughout the chamber and through.

the perforations in the bed from .end to end.

. thereof, so that thereis no irregular working. Heretoforewhen a bellows was used the chamher beneath the bed was really anair-"pressure-chamber andthe pressurewas never;

whollydiscontinued, and. this retarded the separation of the ores and :had the tendency to mix them,so that the result invariably was not only the concentrates and refuse, but also middlings, which latter required to'be cure a maximunrdisch'argeof valuable ore particles with a discharge of refuse limited to a small portion of the-apparatus, I

" In Fig. 1. the frame of thefapparatus-is shown at 1 andcom-prisesa chamber located;

beneath the bed-support-2. 1 Above this sup- 1 port and resting upon it is a bed'or covering-5,

of suitable material, having openings or peri 1 forationsextendingtherethrough, A hopper 3 discharges upon this bed, and above the bed are arranged a series of fiat strips,-prefl erably .of metal, extending diagonally and suitablysecured to thesides 4.. Directly over 1. {1

the stri ps6 are arranged a second set of strips 8, alsoextending diagonally, but running in a-direction contrary to that ofthestrips 6.

The upper strips are somewhat-wider, form ing deeper channels thanthe' stripsG. Between the two sets of strips an air space or channel 7 is provided for apurpose hereinafterset forth; Instead'of making the chamber beneath the bed an air-chamber under a r constant pressure from a bellows or the like, as heretofore, this chamber is simply a space extending beneath the bed, and I admit a pressure of air to the chamber through a pipe 17, which is in connection with any suitable source of air-pressure through its outer end 18. A valve 20 controls this pressure. The

end of the pipe 17 within the chamber has a turned-down elbow 19, which is preferably located near the center of the chamber and near to its bottom, so that the air is discharged centrally of the chamber and downwardly, and thus it is diffused with equal force throughout the chamber and acts with uni- IOO formity upon every part of the perforated bed. The pressure is admitted intermittently,.there being an impulse and then an absolute cessation, which thus allows a perfect concentration according to the specific gravity of the material and avoids the production of middlings invariably in separators having more or less constant pressure in the chamber beneath the bed.

I find it unnecessary to provide a channel along the entire side of the bed for the refuse, and, as shown in Figs. 2 and 3, I extend the strips 6 and S entirely across from side to side of the bed except at the lower corner portion, where I interrupt the strips 8, shortening them at this point, so as to provide a channel formed by the frame 21 and the wall 4, permitting the discharge of the tailings.

I find in practice that as the material flows to the opposite side of the bed at a point where the strips extend entirely across, the material will find its way through the air space or channel between the upper strips 8 and the lower strips 6, thus allowing me to concentrate the finer particles of the valuable material, and thus adds very materially to the production of the machine.

In Fig. 3 Ishow in perspective the discharge end of the machine, and I arrange a rod 24, extending across the bottom, with a small crank 26 on its outerend, this rod being adapted to be turned eccentrically, so as to hold in place a finger 25, which directs the tailings off at one side and forms a line of separation for the heavier and more valuable particles. This finger may be adjusted to narrow or widen the channel for the tailings and is held in place by the rod 24, above referred to.

What I claim is- 1. In an ore-separator, an inclosed chamber, a grating or support across the top of said chamber, a perforated bed or covering thereon, diagonally-arranged strips above the bed or covering, a second series of strips arranged diagonally above the first-mentioned series and in a contrarydirection thereto, and leaving an air-space between the two series and means for causing air-pressure in the chamber and up through the bed and strip, substantially as described.

2. In an ore-separator, a chamber in communication with a source of pressure, a supporting-frame across the top of the chamber, a perforated bed or covering on said frame, a series of diagonally-arranged strips above the covering, and a second series of oppositelyarranged strips above the first leaving a horizontal channel between the lower strips extending from side to side throughout the length and width of the frame,while the upper strips extend throughout the width of the upper half of the frame and only partially of the width of the lower half, substantially as described.

In testimony whereof I have hereunto subscribed my name to this specification in the presence of two witnesses.

JAY J. SNIDER.

In presence of-- W. L. MILLER, W. D. RIDDELL. 

